package com.whc.myblog.web.admin;

import com.whc.myblog.pojo.Tag;
import com.whc.myblog.service.interfaces.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 10, sort = {"id"}, direction = Sort.Direction.DESC) Pageable pageable,
                        Model model){

        model.addAttribute("page",  tagService.listTag(pageable));


        return "admin/tags";
    }

    @GetMapping("/tag-input")
    public String input(Model model){
        model.addAttribute("tag", new Tag());
        return "admin/tag-input";
    }

    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
        model.addAttribute("tag", tagService.getTag(id));
        return "admin/tag-input";
    }
    @PostMapping("/tags/{id}")
    public String editPost(@Valid Tag tag, BindingResult result,@PathVariable Long id, RedirectAttributes attributes){
//        验证是否为空
        if(result.hasErrors()){
            return "admin/tag-input";
        }
//        验证是否重名
        if(tagService.getTagByName(tag.getName())!=null){
            result.rejectValue("name", "nameError", "已经存在该标签！");
            return "admin/tag-input";
        }
        Tag tag1 = tagService.saveTag(tag);
        if(tag1 == null){
            //保存失败
            attributes.addFlashAttribute("message", "更新失败！");
        }else {
            attributes.addFlashAttribute("message", "更新成功！");
        }
        return "redirect:/admin/tags";
    }


    @PostMapping("/tags")
    public String save(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
//        验证是否为空
        if(result.hasErrors()){
            return "admin/tag-input";
        }
//        验证是否重名
        if(tagService.getTagByName(tag.getName())!=null){
            result.rejectValue("name", "nameError", "已经存在该标签！");
            return "admin/tag-input";
        }
        Tag tag1 = tagService.saveTag(tag);
        if(tag1 == null){
            //保存失败
            attributes.addFlashAttribute("message", "添加失败！");
        }else {
            attributes.addFlashAttribute("message", "添加成功！");
        }
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/{id}/delete")
    public String delete(@PathVariable Long id, RedirectAttributes attributes){
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message", "删除成功！");
        return "redirect:/admin/tags";
    }

}
